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The flow of blood that exits a man's anus (similar to a menstrual flow). It only occurs once in his life time, and it is the defining moment of his manhood. The flow lasts for 2-3 weeks and the suffering transforms a boy to a man.

When compared to a females period, greep is scientifically proven to be worse. Dr.Schlitterbauhn, part time disney world OB GYN, commented, "on a scale of numb hand to two stubbed toes, greep is around the pain level of whale birth".
"Dude, you are such a child."
"Naw, man. I greeped last week. Im a full man now."
"Damn straight you are"

"I accidentally licked my greepage."

"Kill yourself now."
Greep by Disneyworldobgyn November 29, 2013
Related Words
a person who is a member of a glee club and tends to be creepy
Wow, that girl in the back of that picture is a greep.

Dang he can sing, but he is still a greep.
greep by IlOvEgLeEcLuB November 30, 2009
Noun - A Geeky Creep. A creep whose modus operandi is super geeky (such as the internet).
verb - the act of creeping out in a geeky manner. used in the smae maner as the verb "to creep out"
He was a typical greep. All he ever did was surf the net and create false identities in the hope of finding a hot date. And when he did find someone, he would greep out his victims by spamming their inbox.
greep by chitsb January 1, 2009
1.To sneak, creep or move in a covert manner.
2.To use a long pole with a hook on the end to grab an object or person.
I hope if I can greep out of work early today without anyone noticing.

I'm going to greep the next person to walk through this door.
greep by Mike March 14, 2005
Something that is innovative, original, with a positive connotation.
Great; original; amazing
That is a greep idea!
I have a greep problem for you!
greep by KOT18 March 24, 2017
A total badass that takes no shit. A soul stealing grim reaper to those that disrespect them.
Did you see him go Greep on that guy that was talking shit?
Greep by Dnelzson1 September 17, 2023